Description
The bzread function in ext/bz2/bz2.c in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9 allows remote attackers to cause a denial of service (out-of-bounds write) or execute arbitrary code via a crafted bz2 archive.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | php5 | 5.6.24+dfsg-0+deb8u1 | DSA-3631-1 |
| Debian 7 | php5 | 5.4.45-0+deb7u5 | DLA-628-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | php7.0 | 7.0.8-0ubuntu0.16.04.2 | USN-3045-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.19 | USN-3045-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | php +24 | 5.4.16-42.el7 | RHSA-2016:2598 |
| RHEL 2 | rh-php56 +2 | 2.3-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php +27 | 5.6.25-1.el6 | RHSA-2016:2750 |
| RHEL 2 | rh-php56-php-pear | 1:1.9.5-4.el6 | RHSA-2016:2750 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | php5 | 5.5.14-73.1 | SUSE-SU-2016:2408-1 |
| SLES 12 SP1 | php7 | 7.0.7-15.1 | SUSE-SU-2016:2460-1 |
| SLES 12 | php5 | 5.5.14-73.1 | SUSE-SU-2016:2408-1 |
| SLES 12 | php7 | 7.0.7-15.1 | SUSE-SU-2016:2460-2, SUSE-SU-2016:2460-1 |
| SLES 11 SP4 | php53 | 5.3.17-79.2 | SUSE-SU-2016:2210-1 |
| SLES 11 SP2 | php5 | 5.2.14-0.7.30.89.1 | SUSE-SU-2016:2080-1 |
| SLES 11 SP2 | php53 | 5.3.17-55.1 | SUSE-SU-2016:2328-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-79.2 | SUSE-SU-2016:2210-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | php +24 | 5.4.16-42.el7 | ELSA-2016-2598 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- PHP 5.5.37/5.6.23/7.0.8 - 'bzread()' Out-of-Bounds Write EDB-40155 · dos · Jul 25, 2016 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 12
- RHSA-2016:2750 Red Hat Security Advisory: rh-php56 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2016:2598 Red Hat Security Advisory: php security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3045-1 php5, php7.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-628-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3631-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2460-1 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2328-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2408-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2460-2 Security update for php7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2210-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2080-1 Security update for php5 SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2016-2598 Moderate: php security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 9, 2016
References
- 92051 vdb-entry
- http://packetstormsecurity.com/files/137998/PHP-7.0.8-5.6.23-5.5.37-bzread-OOB-Write.html
- 20160725 CVE-2016-5399: php: out-of-bounds write in bzread() mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=1358395
- [oss-security] 20160721 CVE-2016-5399: php: out-of-bounds write in bzread() mailing-list
- 20160721 CVE-2016-5399: php: out-of-bounds write in bzread() mailing-list
- https://bugs.php.net/bug.php?id=72613
- RHSA-2016:2750 vendor-advisory
- RHSA-2016:2598 vendor-advisory
- http://php.net/ChangeLog-5.php
- https://security.netapp.com/advisory/ntap-20180112-0001/
- 1036430 vdb-entry
- DSA-3631 vendor-advisory
- http://php.net/ChangeLog-7.php
- 40155 exploit